rename vars, functions and constants to make code less CM specific
rename vars, functions and constants to make code less CM specific

Basically a renaming from 'cm' to 'services' to make code clearer.

GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets